The girl complained to police that an acquaintance Munna, and his cousin Himanshu raped her yesterday, they said.
Munna took the girl with him to his aunt's residence in Ballabhgarh where Himanshu joined them. The duo then took turns to rape her, police said.
The accused also threatened her of dire consequences and fled from the spot, they said, adding, a case has been registered in this connection and efforts are on to nab them.